If you have had a subwoofer added on to the standard U.S. audio system, could you please take a close up picture of the wires they tapped into coming out of that small squarish box on the left side? All you have to do is pop out that left rear trunk piece, just turn the two screw knobs a quarter and pop it on out and take a picture...I just need to know what the left and right + and - wire colors are. Many thanks......